linux-kernel - Re: [PATCH] rust: enable arbitrary_self

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Message-ID: <CAH5fLgjwwnqO1p6GaUgKO+XaMiUtae_f_dO=ZX8CetUGxW0caw@mail.gmail.com>
Date: Tue, 10 Sep 2024 14:25:26 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: Gary Guo <gary@...yguo.net>
Cc: Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Wedson Almeida Filho <wedsonaf@...il.com>, Boqun Feng <boqun.feng@...il.com>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...sung.com>, 
	Trevor Gross <tmgross@...ch.edu>, Masahiro Yamada <masahiroy@...nel.org>, 
	Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, 
	Danilo Krummrich <dakr@...hat.com>, FUJITA Tomonori <fujita.tomonori@...il.com>, 
	Valentin Obst <kernel@...entinobst.de>, Martin Rodriguez Reboredo <yakoyoku@...il.com>, 
	Alex Mantel <alexmantel93@...lbox.org>, Adrian Taylor <ade@...um.me.uk>, 
	rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-kbuild@...r.kernel.org
Subject: Re: [PATCH] rust: enable arbitrary_self_types and remove `Receiver`

On Tue, Sep 10, 2024 at 2:09 PM Gary Guo <gary@...yguo.net> wrote:
>
> The `arbitrary_self_types` RFC [1] is accepted and the feature is being
> worked on [2]. As part of the RFC, a new `Receiver` trait is to be added,
> and it will be automatically implemented for all types that have `Deref`
> implementation. This is different from the existing `Receiver` trait
> that we use, which is a custom implementation that opts-in a type into
> being used as receiver.
>
> To prepare us for the change, remove the `Receiver` implementation and
> the associated feature. To still allow `Arc` and others to be used as
> method receivers, turn on `arbitrary_self_types` feature instead.
>
> Cc: Adrian Taylor <ade@...um.me.uk>
> Link: https://github.com/rust-lang/rfcs/pull/3519 [1]
> Link: https://github.com/rust-lang/rust/issues/44874 [2]
> Signed-off-by: Gary Guo <gary@...yguo.net>

Please update the commit message to explain the compatibility
situation with various rustc releases.

Alice